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Title: The Echinoids of Easter Island (Rapa Nui) 
Author: Fell, F Julian
Date: 1974-04
Publisher: University of Hawai'i Press
Citation: Fell FJ. 1974. The echinoids of Easter Island (Rapa Nui). Pac Sci 28(2): 147-158.
Abstract: The known echinoid fauna of Easter Island now comprises seven
species. Four of them, Tripneustes gratilla, Echinostrephus sp., Clypeaster reticulatus,
and Brissus agassizii are reported here from Easter Island for the first time, Tripneustes
gratilla apparently being represented by a previously unknown variant. The
value of the pedicellariae and the heavily plated peristome as specific differences in
the genus Tripneustes is questioned. Comparison of Easter Island material with
specimens from other parts of the Pacific supports the synonymy of Brissus meridionalis
with Brissus agassizii. One of the previously reported species, Echinometra
insularis, is herein restricted to Easter Island, reports of its occurrence elsewhere
being based upon erroneous identifications. The reported occurrence of Diadema
mexicanum at Easter Island is discounted.
ISSN: 0030-8870

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